---

作 者 ：刘建伟 刘雅荣 朱春全 王世绩 Terence J. Blake

期 刊 ：林业科学 1994年 30卷 6期 页码：481-486

关键词：杨树无性系；叶片主脉长；最大宽；叶面积；模型；

Keywords:Poplar clones, Leaf blade length, Lesf blade maximumwidth, Models,

摘 要 ：应用Li-3000A叶面积仪测定了8个无性系的叶型及叶面积指标,选择了8个模型,以叶片主脉长(L)和最大宽(W),以及两者乘积(L×W)为三个变量作与叶面积的相关关系分析,筛选出复相关系数均达0.95以上的最佳模型为:(1)与两者乘积的叶面积模型:lgY=a+bx+b+clgx,(2)与最大宽度的模型:Y=a+bx+cx²。但与叶片主脉长模拟效果较差。此外,还得出了杨树无性系的叶面积通用模型,即:Y=—0.450826十0.00071X+0.976335lgx(x为L×W),和Y=—1.697387十0.733497x—0.001253x²(x为W)。上述8个无性系及杨树通用的模型的建立为叶面积的计算、预测等生理生态研究提供了科学依据,使得叶面积测定更加省时、可靠和方便。

Abstract:The length and maximum width of leaf blades of 8 clones of Populus spp. were measured with Li—ocr 3000A area meter, and 8 types of regression models were established to predict leaf area (Y) from leaf length (L),maximum width (W) or the product of L and W. The result showed thatthe best models were: (1) lgY = a + bx + clgx, where X for L ×W; (2) Y =a+bx+cx², in which X was for W. But a poor relationship existed with the leaf length. Therefore, the above models for the 8 clones i. e. lgY=-0.450826 + 0 000771 + 0.976335lgx and Y=-1.697387 + 0.733497x-0.001253x², were established, and might fit to other too.

---